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Finding the Fourth Proportional to 1,271.02, 1,891.31 and 1,266.70

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Solution

The fourth proportional to 1,271.02, 1,891.31 and 1,266.70 is: 1,884.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,271.02 : 1,891.31 = 1,266.70 : x
  2. Step 2: Convert to fraction form
    1,271.02/1,891.31 = 1,266.70/x
  3. Step 3: Cross multiply
    1,271.02x = 1,891.31 × 1,266.70
  4. Step 4: Simplify right side
    1,271.02x = 2,395,716.04
  5. Step 5: Solve for x
    x = 2,395,716.04/1,271.02
  6. Step 6: Final answer
    x = 1,884.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.